Combination-tool.



H. M. DEMMER.

COMBINATION TOOL.

APPLICATION FILED NOV. 27, I914.

1,139,648. Patented May 18, 1915.

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THE NORRIS PETERS 60.. PHOTO-L/THO WASHINGTON 0 c HENRY ivr. DEIVIMEB, or DETROIT, MICHIGAN.

COMBINATION-TOOL.

Specification of Letters Patent.

Patented May 18, 1915;

Application filed November 27, 1914. Serial No. 874,143.

To all whom it may concern:

Be it known that I, HENRY M- DEMMER, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Combination-Tools, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to a combination tool, and the object of my invention is to combine an ordinary mechanics square, a

center square, a protractor, and a scale or.

rule, these devices being combined to provide a novel instrument of precision that will facilitate the work of mechanics and other artisans. I

In the general make up of the tool, the parts are constructed with a View of reducing the cost of manufacture and at the same time retain features by which accuracy, durability, ease of adjustmentand assembling are secured, and with such ends in view, my invention residesin the novel construction to be hereinafter specifically described and then claimed.

*teference will now be had to the draw ings, wherein- Figure 1 is a plan of the tool illustrating the same as a center square; Fig. 2is a side elevation of the same partly broke n away and partly in section; Fig. '3 is a plan of the tool illustrating the same asan ordinary square; Fig. 4 is a cross sectional view taken on the line IVIV of Fig. 1'; Fig. 5 is a bottom plan of a detached member; Fig. 6 is a cross sectional-view of the same, and Fig. 7 is a horizontal sectionalview of the member.

A combination tool in accordance with my invention comprises flat angle or L shaped plates arranged in parallelism,'the top plate having legs 1 and 2 in spaced'relation to legs 3 and ,4 of the bottom plate. The

legs of the top and bottom plates are cut away, as at 5, to reduce the weight of the same and at the juncture of the legs 1 and 2 of the top plate, there is a substantially circular opening 6 in alinement with, a correspondingly shaped recess 7 at the juncture of the legs 3 and 4 of the bottom plate. 7

Rotatably mounted in the opening 6 and the recess 7 is an adjustable member 8 provided with a segmental flange 9 that extends between the top and bottom plates and cooperates with a spacer 10 between the legs 1 and 3 in spacing the top and bottom plates apart, the spacer 10 being secured between the outer ends of the legs 1 and 3 by screws 11 or other fastening means. The top of the member 8 has a peripheral flange 12overlying the top plate of the tool, and centrally of the member 8 is a bore 13 for a center pin 14. This pin has the lower end thereof provided with a head 15 and a radially disposed pin 16, the former being countersunk in the bottom plate and the latter limiting rotative movement of the center pin 14. The upper end of the center pin 14 terminates in a screw 17 for a knurled thumb nut 18 engaging the top of the adjustable member 8. By tightening the nut 18 the member 8 can be locked in an adjusted position relative to the top and bottomplates of the tool. The

center pin 14 has a transverse groove 19 normally in communication with a slot 20 in the member 8, and as a matter of good construction, the member 8 is made in two pieces firmlysecured together, the two piece member permitting of thesame being properly machined and constructed, as will presently appear.

The bottom wall of the slot 20 has a transverse tongue or rib 21 with a wall thereof beveled and in parallelism with thetongue is a yieldable tongue 22. This tongue extends through a slot 23 provided therefor in the bottom wall of the slot 20 and said tongue is carried by an oblong plate 24 housed within a groove 25 in the bottom of the adjustable member 8. In the groove 25 is a flat compression spring having lateral eX tensions 26 countersunk in thebottom of the adjustable member 8 and retained in engages ment therewith by small screws 28 or other fastening means. The flat compression spring yieldably supports the tongue 22, but maintains said tongue normally elevated in parallelismwith the tongue 21. The tongues 21 and 22 are adapted to engage in sets of parallel grooves 29 and 30 provided therefor in opposite faces of a scale 31 arranged in the slot'20 and extending into the grooves 19 of the center pin 14 and between the top and bottom plates of the tool. The grooves 29 and 30 extend throughout the length of the scale 31 and said grooves are contiguous to the side edges of the scale, said scale having suitable graduations. The scale can be easily shifted between the top and bottom plates of the tool and with the scale in one position, an edge thereof intersects the center of the adjustable member 8 and the verteX formed by the angularly disposed legs of the tool. The adjustable member 8'is' provided with a V shaped notch'32 and the walls of this notch are positioned in the plane of walls ofthe legs whereby the scale can intersect the vertex of the angle formed I top plate is provided with a slide latch 33 that can be shifted to engage in notches 34 in the periphery of the adjustable member 8. The slide latch 33 is shifted'through the medium of a sorew35 and a knurled nut 36, said nut permitting of the latch being se cured in an adjusted position to rigidly hold the adjustablemember relative to the legs of the tool. To hold the scale 31 in adjusted position, the member 8 is provided with a screw 37 and a partial rotation of this screw binds the scale in the slot 20 of,

the member 8.

The'top and bottom plates are cut away, as at 88, to reduce the weight of the tool, and the top plate at the edges of the opening 6, are graduated to the extent of ninety degrees and it is through the medium of these graduations that the member 8 can be adjusted to posltion the scale at a desired angle relative'to the legs of the tool. 7

I attach considerable importance to the yieldable tongue 22 and the fact that there is a constant pressure againstthis tongue, thereby causing the tongue to exert a constant pressure'against the scale 31 and by virtue of' the beveled wall of said tongue,

hold the'scale 31 snugly against the tongue 22, thereby retaining the edge of the scale 31 in position to intersect the vertex of the angle formed by the walls of the notch 32.-

It ,is thought that the utility of the tool will be apparent without further description, and while in the drawing there is illustrated a preferred embodiment of my invention, it is to be understood that the Copies of this patent may be obtained for structural elements are susceptible to such changes as fall within the scope of the appended claims.

What I claim is L'A combination tool comprising spaced top and bottom plates provided with legs,an

adjustable member rotatably supported by said top and bottom plates, a scale slidable in said member and between legs of said top and bottom plates, and capable of being positioned to bisect the angle formed by the legs of said top and bottom plates, a yieldable tongue forming part of said member and engaging in'the bottom side of said scale, and means carried by said member for holding said scale in adjusted position.

2. A combination tool comprising a top and bottom plate each having legs disposed at right angles to one another, a rotatable member supported by saidplates at the junc ture of the legs thereof andhaving a limited V movement relative to said plates, a scale slidable in said member and between legs of said top 'and bottom' plates, a tongue and groove connection betweensaid member and said scale, 'means carried by said member for holding said scale in adjusted position,land means carried-by one of the legs of said'top plate for :locking said rotatable member in adjusted position. 1 a

3. A combination tool comprising top and bottom plateshaving legs disposed atright angles to eachother, a rotatable member sup ported by said top and bottom plates having a notch in the, periphery thereof adapted to formrthe angle between the legs of said top and bottom plates, a slide detachably and adjustably held by saidmember and capable of being positioned to bisect the angle of the notch of said member,a yieldable tongue carried by said member and engaging in said slide, means carried by said member :for

locking the slide in adjusted position, and means for holding said rotatable member in adjusted position. 7 V

' In testimony whereof I aflix my signature in presence oftwo witnesses H HENRY M. DEM ER;

Witnesses: V

ANNA M. Donn, i VVKARIV. H, BUTLER.

Washington, D. Cg?

five cents each, by addressing the Commissioner of Patents. 1 

